I'm pregnant and scared

I recently learned that I'm pregnant.
My sweetie pie does not know yet and I'm afraid of how to approach him on the matter. Not only to tell him I'm pregnant, but I also want an abortion. 
I feel terrible because this was so unexpected (oh my god, I KNOW sex CAN make a baby) and I know he wants a child.
However, I am NOT meant to be a mother and before people ask how I know that, I had a child before that I was forced to keep and to this day, it messes with me greatly on how I was forced to keep a pregnancy going.
Please, how should I approach him on the subject without seeming like I'm throwing everything on him?
Also, some side things just so it's not written a million times:
Adoption is NOT an option
I have no interest in 'trying' to stick with it because I 'might' change my mind
I really don't care what your religion says about my body
PS:
Please be nice, I already feel kinda silly asking for help...

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